<template>
    <div class="app-container">
        <el-form label-width="120px">
            <el-form-item label="信息描述">
                <el-tag type="info">excel模版说明</el-tag>
                <el-tag>
                    <i class="el-icon-download" />
                    <a :href="'/static/01.xlsx'">点击下载模版</a>
                </el-tag>
            </el-form-item>
            <el-form-item label="选择Excel">
                <el-upload 
                    ref="upload"  
                    :auto-upload="false" 
                    :on-success="fileUploadSuccess" 
                    :on-error="fileUploadError":disabled="importBtnDisabled" 
                    :limit="1" 
                    :action="BASE_API + '/eduservice/subject/addSubject'" 
                    name="file" 
                    accept="application/vnd.ms-excel">
                    <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
                        <el-button :loading="loading" style="margin-left: 10px;" size="small" type="success"
                            @click="submitUpload">上传到服务器</el-button>
                </el-upload>
            </el-form-item>
        </el-form>
    </div>
</template>
<script>
export default{
    data(){
        return {
            BASE_API: process.env.BASE_API, // 接口API地址
            importBtnDisabled: false, // 按钮是否禁用,
            loading: false
        }
    },
    created(){

    },
    methods:{
        //点击按钮上传文件到接口里面
        submitUpload(){
            this.importBtnDisabled = true
            this.loading = true
            //js:document.getElemetById("upload").submit()
            this.$refs.upload.submit()
        },
        // 上传成功
        fileUploadSuccess(response){
            //提示信息
            this.loading = false
            this.$message({
                type:'success',
                message:'添加课程分类成功'
            })
            //跳转课程分类列表
            //路由跳转
            this.$router.push({path:'/subject/list'})

        },
        //上传失败
        fileUploadError(){
            this.loading = false
            this.$message({
                type:'error',
                message:'添加课程失败'
            })
        }
    }
}
</script>